[Python-ideas] Fwd: Iterable unpacking within containers

[Jonathan Slenders]

What about:

>>> y = [-2] + list((-1, 0)) + list(x) + [4, 5]

or itertools.chain?




2013/6/24 SpaghettiToastBook . <spaghettitoastbook at gmail.com>

> I think it would be very convenient if the * syntax was extended to
> allow unpacking iterables inside containers. For example:
>
> >>> x = range(1, 4)
> >>> y = [-2, *(-1, 0), *x, 4, 5]
> >>> print(y)
> [-2, -1, 0, 1, 2, 3, 4, 5]
>
> This would be especially convenient if two lists needed to be
> combined, but one list's contents needed to be the the middle of the
> other one. I don't think any code would break because the suggested
> syntax currently raises a SyntaxError.
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